| Analog Device AXI-DMAC DMA controller |
| |
| Required properties: |
| - compatible: Must be "adi,axi-dmac-1.00.a". |
| - reg: Specification for the controllers memory mapped register map. |
| - interrupts: Specification for the controllers interrupt. |
| - clocks: Phandle and specifier to the controllers AXI interface clock |
| - #dma-cells: Must be 1. |
| |
| Required sub-nodes: |
| - adi,channels: This sub-node must contain a sub-node for each DMA channel. For |
| the channel sub-nodes the following bindings apply. They must match the |
| configuration options of the peripheral as it was instantiated. |
| |
| Required properties for adi,channels sub-node: |
| - #size-cells: Must be 0 |
| - #address-cells: Must be 1 |
| |
| Required channel sub-node properties: |
| - reg: Which channel this node refers to. |
| - adi,source-bus-width, |
| adi,destination-bus-width: Width of the source or destination bus in bits. |
| - adi,source-bus-type, |
| adi,destination-bus-type: Type of the source or destination bus. Must be one |
| of the following: |
| 0 (AXI_DMAC_TYPE_AXI_MM): Memory mapped AXI interface |
| 1 (AXI_DMAC_TYPE_AXI_STREAM): Streaming AXI interface |
| 2 (AXI_DMAC_TYPE_AXI_FIFO): FIFO interface |
| |
| Deprecated optional channel properties: |
| - adi,length-width: Width of the DMA transfer length register. |
| - adi,cyclic: Must be set if the channel supports hardware cyclic DMA |
| transfers. |
| - adi,2d: Must be set if the channel supports hardware 2D DMA transfers. |
| |
| DMA clients connected to the AXI-DMAC DMA controller must use the format |
| described in the dma.txt file using a one-cell specifier. The value of the |
| specifier refers to the DMA channel index. |
| |
| Example: |
| |
| dma: dma@7c420000 { |
| compatible = "adi,axi-dmac-1.00.a"; |
| reg = <0x7c420000 0x10000>; |
| interrupts = <0 57 0>; |
| clocks = <&clkc 16>; |
| #dma-cells = <1>; |
| |
| adi,channels { |
| #size-cells = <0>; |
| #address-cells = <1>; |
| |
| dma-channel@0 { |
| reg = <0>; |
| adi,source-bus-width = <32>; |
| adi,source-bus-type = <ADI_AXI_DMAC_TYPE_MM_AXI>; |
| adi,destination-bus-width = <64>; |
| adi,destination-bus-type = <ADI_AXI_DMAC_TYPE_FIFO>; |
| }; |
| }; |
| }; |